feat(alert): A2 告警引擎分布式安全 — Redis 分布式锁(SetNX)

- Cache 接口新增 SetNX 方法(go-redis 原子 / redka check-then-set 单副本安全)
- AlertEngine 改造为支持分布式锁: tryAcquireLock/releaseLock/GetEngineStatus
- 多副本部署时仅 Leader 执行告警检查, 60s TTL 防死锁, fail-open 容错
- 新增 GET /alerts/engine/status 监控端点(is_leader/instance_id/lock_holder)
- 修复 GrafanaDashboard.tsx Panel.options 类型不匹配导致构建中断
- 同步未提交的前端类型安全迁移(140+ 文件)
- ROADMAP/TDD_PLAN/PROJECT_EVALUATION 三文档同步更新

验证: go build 零错误, Docker 部署 healthy, 引擎状态端点正常,
锁竞争测试通过(非 Leader 跳过检查), 5/5 核心 API 回归通过

frontend/src/components/agent/HostDetailDialog.tsx

@@ -29,17 +29,18 @@ import {
   Tooltip,
   ResponsiveContainer,
 } from 'recharts';
+import type { JsonData } from '@/types/common';
 
 export function HostDetailDialog({
   host,
   onClose,
   onCommand,
 }: {
-  host: any;
+  host?: JsonData;
   onClose: () => void;
   onCommand: (hostname: string) => void;
 }) {
-  const [history, setHistory] = useState<any[]>([]);
+  const [history, setHistory] = useState<JsonData[]>([]);
   const [loading, setLoading] = useState(false);
   const [hours, setHours] = useState(1);
 
@@ -60,7 +61,7 @@ export function HostDetailDialog({
   if (!host) return null;
 
   const online = isOnline(host.last_report || host.last_reported_at || host.updated_at);
-  const ports: Record<string, any>[] = Array.isArray(host.ports) ? host.ports : [];
+  const ports: JsonData[] = Array.isArray(host.ports) ? host.ports : [];
 
   const chartData = history.map((h) => ({
     time: new Date(h.timestamp || h.time || h.created_at || Date.now()).toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit' }),